R
EV
9
141
A
MERICAN
M
AGNETICS
, I
NC
.
R
EMOTE
I
NTERFACE
R
EFERENCE
: P
ROGRAMMING
O
VERVIEW
ting is persistent if the Model 430 Programmer is configured for
*PSC 0
(no
status clear on power-on).
C
OMMAND
H
ANDSHAKING
The Model 430 Programmer provides an internal command queue that
can store up to 4 commands or queries. However, it is possible that the
host computer can overwhelm the command queue by sending
commands faster than the Model 430 can execute. If the Model 430
Programmer cannot process a command due to a full command queue,
the command is ignored and the
-303,”Input overflow”
error is
reported.
Handshaking is generally not a concern unless more than 4
commands
are sent sequentially. If a
query
is sent, the user will normally wait for
return data for the queries before proceeding to send the next query or
command. In the case of sending numerous
commands
in sequence,
there are two methods available to help prevent command queue
overflows which are discussed below.
U
SING
THE
*OPC
C
OMMAND
The
*OPC
command is executed within the normal command
queue. Upon completed execution of the
*OPC
command, the
“Operation Complete” bit (bit 0) of the Standard Event register will
be set. This command is useful should many commands be sent
to the Model 430 Programmer in rapid succession.
Bit Definitions for the Standard Event Register
Bit Number
Decimal
Value
Definition
0 Operation Complete
1
All commands prior to and including
*OPC
have been executed.
1
Not Used
2
Always “0”.
2 Query Error
4
A query error occurred. See the error
messages in the -200 range.
3 Device Error
8
A device error occurred. See the error
messages in the -400 range.
4 Execution Error
16
An execution error occurred. See the
error messages in the -300 range.
5 Command Error
32
A command error occurred. See the
error messages in the -100 range.
6
Not Used
64
Always “0”.
7 Power On
128
Power has been cycled since the last
time the Standard Event register was
read or cleared.
Summary of Contents for 430
Page 2: ......
Page 16: ...XVI REV 9 AMERICAN MAGNETICS INC FOREWORD SAFETY SUMMARY ...
Page 28: ...12 REV 9 AMERICAN MAGNETICS INC INTRODUCTION OPERATING CHARACTERISTICS ...
Page 64: ...48 REV 9 AMERICAN MAGNETICS INC INSTALLATION POWER UP AND TEST PROCEDURE ...
Page 208: ...192 REV 9 AMERICAN MAGNETICS INC SERVICE RETURN AUTHORIZATION ...
Page 248: ...232 REV 9 AMERICAN MAGNETICS INC APPENDIX SHORT SAMPLE MODE ...
